Plant for the continuous manufacture of fat-impregnated leather



F. GAJDOSIK Nov. 25, 1958 PLANT FOR THE CONTINUOUS MANUFACTURE OF' FAT-IMPREGNTED LEATHER 2 Sheets-Sheet 1 Filed Nov. 25, 1955 Nov. 25, 1958 F. GAJDosiK 2,861,542

PLANT FOR THE CONTINUOUS MANUFACTURE OF FAT-IMPREGNATED LEATHER Ferdrband QJ'doX/ www n/ Unitedl States Patent 2,861,542

The precisely timed'stepwise passage of the. skins 2,861,542 through the fat-impregnation bath contributes likewise t h d r n h h d d PLANT Fon THE coNTiNUoUs MANUFACTURE o agh a? um Orm-qua l Y of t e. ms e. pro et oF FAT-MPREGNATED LEATHER Ferdinand Gajdosk, Otrokovice, Czechoslovakia, asations manually and therefore it has been impossible to Paenfed Nov. 25, 195s` signor to Svit, nrodn podnik, Gottwaldov, Germany obtain the required high-grade product.

By converting the hitherto usual hand labour into an Apphcaton November 25 1955 Sena] No' 549097 automatic and controllable impregnation period in ac- Claims priority, appiication Czechosiovakia cordance with the present invention, the aforesaid irregu- November 27, 1954 larity has now been eliminated. At the same time, the 2 Claims. (Cl. 118 423) hitherto indispensable strain put on .the workers perform-Y The object of the present invention is to provide a plant for t e automatic continuous manufacture of dessipresses and similar articles.

included in the plant according to the invention,

ig. 3 a partial View of a transferring device included have been performed by hand, which required an excesin the plant of Fig. 1,

ig. 4 a diagrammatic lan view of a holdi -d atmosphere at temperatures above 50 C. p ng Own dripping device of an im re nation bath inthe lant An essential drawback of such production method for Fig 1, and p g p of small output at considerable production cost without obtaining always a rst-rate product.

The aforesaid disadvantages have now been eliminated by the production plant according to the present invencording to Fig. 4.

heating chamber 5, a fat-impregnation chamber 6, a

dried state are conveyed by the same conveying chain 40 wherein t conveying chain, by which the leathers are drawn through struments 14a (Fig 2 Fig. 5 a diagrammatic front view of the device ac- A tunnel space l'of the drying plant embodying this sequence onto a further endless chain in the fixing chamdescription or in the drawings Included m the following ber, and which projects into the storage chamber forming The independent tunnel drying plant S with its inlet amagazine of the finished leathers. "wall 10 and outlet wall 11 is inside the tunnel space 1 efore being drawn through the fat bath, the leathers provided in a transverse direction with columns 12 (Figs must be dried out at an elevated temperature to a mois- 1 and 2).

a chain 17 is rovided with noses esult in the decay of the finished leather or even in e ind and transport rds 19 lying on the iiptei iiiia urning and destruction of the leather mass of the danp the chain and having hooks 20 depending therefrom from action of the croupon. which the skins U can be suspende In equipment in accordance with the present invention, V Within the fat-impregnation chamber 6 a further ende sk.

rm high quality of the dried skins can be attained pulleys 23 and 24 are mounted rotat Y Afore entering the fat-impregnation bat and 41 in bearings 39 and 40 mounted on the an impregnation vat 28 (Figs. 1 and 4). On the shaft 31. ofthe pulleys 23 a pulley 34 isrotatably arranged and is connected, through an endless chain 42, with a pulley 37 on a shaft 32. On lthe shaft 32, mounted turnablyA vwithin the bearings 3S',of tliefrarne `tof the-fatimpregnation vatlZ a further pulley 36 is zarranged'and is connected, throughthe endless chain`43, with "af-pulley 38 on a shafty 33..A` The'pulleys 23Jon` the shaft 31:-a're connected, through. endless chains '21,12` 'withthe' pulleys 24 on'the shaft41 whereby all .four shafts 31, 321,-` 33' and 41 are simultaneously,rotatable (Figi-4'). of said shafts 31, 32La`nd 33,. as can be seen in Figs. 1, 4 andS six dipping holding-down stirrups 45,'46and 47 are ,provided` for :action during lthe passage through ,the fat-irrlpregnation bath L (Figs. Thestirrups 4546.and. 471are provided with cutouts 4S enabling thelmovement bythe conveyor chain Zllof the rodsi19V with ,the skinsiU .suspended thierreoriY through. the fat-impregnation bath L, (Figs. 1` and5).` Ona carrieri49.,connected,with thecolumns 12. and 13 insidetbefixing chamber17, pulleys 52 arranged, as can be seen in Fig. carrier 55` connected with the column 131m the storage chamberS, apulley 5 4 is rotatably arranged. The pulleys 52, 53 and 54 carryk an endless chain 56 running therearound.l Co-,axially withV the ley 57 iS mountedv and connected `through chain 5,8with a lpplleyv?,driven together ,with the pulley 25 through worm drives, which are schematically representedat 59a and,V 251,1, from an electricmotor 60.

Inside the fat-impregnation chamber'6 at its top part are provided carriers i 62. and 6,3, carrying thejtransferring devices formedby toggle levers 66 and 67, the shorter arms 63 and69- of which arev adjustable equalizing arms.

The plant above described operates as follows:

The skinUn having undergone the necessary treatment on ai punching machine is suspended by meansv of hooks 2t) on a` rod 19' a Ad introduced into the drying plant through an aperture provided in the inlet Wall and brought onto the conveyor chain 17, whereupon the whole mechanism is set in motion by a push button not illustrated. The skin U advances inside the pre-drying chamber 2 through a distance of 150 mm. whereupon-the whole device is stopped. Each skin is suspended in the same way yon the hooks 20 and rods 19 andA set byY the push button not illustrated into motion, which process` is repeated', Vnntilfthe chambers 2, filled iipwwith skins. By the same conveyor chain 17 the' skins U lareadvanced inside the chambers 1n such a manner that they are first pre-dried in the chamber 2, then driedbutin' the ch mbers 3 and 4 and iinally preheated in 'the' chamber 5. 'i The air circulating inside said chambers is automatically vadapted in air conditioning towers 9` (Fig. 2') Yin accordance with the pre-determined operational conditions ofthe drying plant, throughthe action of well known control and recording instruments. The skins are proceeding at the adjusted necessary temperature Vand required dampness through the four chambers 2, 3, 4` and S following an accurately'deterrnined technological cycle.v i This drying process enables the hitherto usual drying period of 240 hours'to be reduced to only 24"hours,'that is`, to M0.

` As'soon'as a skin, having passed throughrthe Whole drying plant`t4 chambers), arrives at the end of the conveyor'chain 17, the'rod 19 suspended together with the skin U on hooks 2.0' glides down, as indicated in Fig. 3, onto the transferring device formed by the toggle levers v66 and 67 and onto the inclined carrier 70 where its gliding down movement arm of the rod 19 have been" brought down together withV the skin U onto the armsv of the toggle lever 66, vthe weight of the rod `19 and t'heskin U overcomes that ofthe equalizing arm 68, `and the rod 19 with the skin U is evenly On each offthel skin UV i, 4V aad- 51) .j

and 53. are 1 andon an inclined` pulley 5,4 another Apulan' endless 60a and 61 which support bearingsr 3, 4 and 5 are'entirely transferred into the position I (Fig. 3). Through the influence ot the equalizing shorter arms 68, 69 of the levers 66, 67 turning in the bearing 62, 63, the movement of the rod 19 and skin U is slowed down. The rod 19, as can be seen in Fig. 3, moves from the position l to the end of the longer armof the toggle lever 67 in the bearings 63. Through the weight of the skin U, the arms vofr the lever 67 kwith the rod 19- and s`kin-U-swin'gl out into theposition Il indicated in dotted lines, and a nose 71 or 75 on a further conveyor chain 21 (Figs. l and) then engages in back of the rod-19.110 -move the latter out of engagement with the toggle lever 67 and further along the path definedn by the carrier 70. :The letters SH designate a plate which is secured to the vat 28. The chain 21 further conveys'th'e' rod' 19 with the skin U and the latter is simultaneously dipped progressively into the fat-impregnation bath by :the `dipping holding-down stirrups 45, 46 and 47 (Figs. l, 4 and 5). In order to avoid any breaking of the continuous immersion passage of the skin U through the impregnation Ybath L,.the holding down dipping stirrups ,45,- 46 and 47 are provided, as can be seen in Fig. 3 with cutouts 48 for the purpose of avoidinginterference of the stirrups with the rods 19. After its passage throughthe bath. L, the skin U is further transported upwards by the nose 71 or 75 of the conveyor chain 21, the excessiveimpregnation.

liquid dripping oiiA during this transport.`

The time required ifor'movementof the skin U on the rod 19, from the moment of its transfer to the nose 71: of the'chain 21'(Figs;A 1` and `3)-andduring its movement through the'bath L and upwards toa position above the carrierl-72,"corresponds to the time takeny up by the' transport over' the distance of 150 mm. during Ythe stepwise Aadvances-of the skin U on the rod 19 and hook 20 in the chambers 2, 3, 4 and 5.` `By this simultaneous movement, the nose 75 on the conveyor chain 21 is transferred simultaneously to the position of the nose .'71V (Fig. l) whenever a skin U has been'trans'ferred by the levers 66 and 67.

As soon as the skin U in its continuous movement arrivesv at the level of the inclined vcarrie`r-72 (Figttl-r, the related rod I19 is released4 from and it glides down along the carrier 72.- onto one ofthe' noses-7i` of a further endless conveyor chain 5S inside the fixing chamber 7 wherethe excess fat is allowedfto drip from the fat impregnated skins U and the latteriare. dried and cooled. Thereupon the skins U are conveyed in a further continuous lsequence vbyA the same conveyor chain56. into the storage chamber 8 wherefrom theycan finished product through an aperture provided in the outlet wall 1 1. 'On the skins underV treat# ment being steadily introduced onV the endless conveyor chain 17 through the opening in the inlet ywall 10,the above disclosed plant is'working continuously-'and automatically, with the exception of themanuallintroduction of the skins to be treatedand the withdrawal of the finished leather.l f

The 4equipment according to the present invention makes it possible to avoid the hitherto usual heavy lstrain on the workers in a harmful atmosphere, where all the above described operations had to be performed by hand. The number of Workers could be greatly reduced and their manual labour limited to the supply of tanned skinsv and theremoval of the finished fat-impregnated leather. Thus, it is possible to attain a much higher productivity of work,-an improved quality of the leathers for use ir manufacturing drive belt and othertechnical obiects, vtc reduce substantially the production cost and to eliminata human labour from hygienically harmful spaces.,

l. In a plant for the continuous production of fat impregnated leathers; the combination of an upwardl open bath containing .fat for impregnation of hides passe therethrough, conveyor means'extending across the to I5 of Saidbath and operative to vtransport successive rot the lnos'e 71 or 75,

from which hides pended, drive means propelling said conveyor means at References Cited in the le of this patent UNITED STATES PATENTS Amidon May 17, 1904 Mueller Feb. 10, 1925 Mern'tt Dec. 11, 1928 UNITED STATES PATENT QEEICE y CERTIFICATE OF CGRRECTION Patent Netfeel A November v25, 1958 Ferdinand Gejde/E It is heteby oert'tfecl that error appears in the above numbered patent reqring correction and that thel said Letters Patent should read, as Corrected belowa A In the grant, lines 2 and 3, and in the heading vto thevprnted specification, line 5, address of assignee, for "Gottwaldov, Germany", Yeach occurrence, read me Gottwaldov, Czechoslovakia .signed end eeele'd this 29th eey ef september 195% y (SEAL) Attest:

,KAR-Hf-AXLNE RoEERTc. wATsoN .lhztestingv Officer Cemissiener of Patents 

